sam-ba: use SPDX short identifier for license string

Signed-off-by: Rahul Bedarkar <rahulbedarkar89@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/sam-ba/sam-ba.mk

@@ -8,7 +8,7 @@ SAM_BA_SITE = http://www.atmel.com/dyn/resources/prod_documents
 SAM_BA_VERSION = 2.16
 SAM_BA_SOURCE = sam-ba_$(SAM_BA_VERSION)_linux.zip
 SAM_BA_LICENSE = SAM-BA license (sam-ba executable), \
-		BSD-2c like, BSD-4c (TCL and applets code)
+		BSD-2-Clause like, BSD-4-Clause (TCL and applets code)
 SAM_BA_LICENSE_FILES = doc/license.txt tcl_lib/boards.tcl \
 		applets/sam4c/libraries/libchip_sam4c/include/sam4c/sam4c32e-1.h